N91 Absent, scanty and rare menstruation

Non-billable header with 6 child codes.

Excludes1 (never code together)

• ovarian dysfunction (E28.-)

Applies from N91 Absent, scanty and rare menstruation

Excludes1 (never code together)

• ovarian dysfunction (E28.-)

Codes under N91

• N91.0 Primary amenorrhea
• N91.1 Secondary amenorrhea
• N91.2 Amenorrhea, unspecified
• N91.3 Primary oligomenorrhea
• N91.4 Secondary oligomenorrhea
• N91.5 Oligomenorrhea, unspecified

Nearby codes

• N91 Absent, scanty and rare menstruation (this code)
• N91.0 Primary amenorrhea
• N91.1 Secondary amenorrhea
• N91.2 Amenorrhea, unspecified
• N91.3 Primary oligomenorrhea
• N91.4 Secondary oligomenorrhea